Offset disk harrow



J. G. LINDEMAN April 26, 1932.

OFFSET DISK HARROW Filed Oct. 2l, 1929 3 Sheets-Sheet w@ Nm.

31a/vanto@ l z/. linde/11u11 April 26, 1932. J. G. LINDEMAN 5 OFFSETDISK HARRow Filed Oct. 21, 1929 3 Sheets-Sheet 2 gnue'n o1', J'.Lindenau atto: mab

April 26, 1932- `J. G. LINDEMAN 1,855,605

OFFSET DISK HARROW Filed Oct. 2l. 1929 3 Sheets-Sheet 3 Patented Apr.26, 1932 Jnssn e. LINDEMAN, or YAKIMA. 'wnsnfineroi:p

onrsirr msx HeRRoW Application filed October 21, 1929. Serial No.401,167.

This invention relates to new and useful improvements in oset diskharrows.

The primary object ofl the invention'is to provide an oHset disk harrowwhich may be angled to permit either a right or left turn without dangerof breaking the disks or without digging holes in the ieldor land beingtreated. Y Y A further object of the invention is to provide an oisetdisk harrow which may be adjusted to 'permit any"desiredidegree of ofsetor which may be adjusted so that thev several gangs will. traildirectlybehind the power plant employed for propelling the same.

A still further object of the inventionis to `provide an oiset diskharrowhaving means for permitting angling of the gangs and additionalmeans for odsetting they gangs to any desired extent with controllingmechanism for said means which may be actuatcdby the driver of a tractoror the like without necessitating leaving the seat of the said tractor,and more specifically wherein a single control lever is employed foroperating the aforementioned adjusting means.

Another object of the invention is to provide a novel form of fifthwheel structure connecting the front and rear gangs with latching meansfor retaining the gangs angled, the said latching means being associatedwith the fifth wheel structure.`

Other objects and advantages of the inven` tion will be apparent duringthe course of the following description.

In the accompanying drawings forming a part of this specification, andin which like numerals are employed toy designate vlike parts throughoutthe same,-

Figure 1 is a top plan view of the offset disk harrow embodying thisinvention. Figure 2 is a side elevational view of-the mechanismdisclosed in Figurel.

Figures 3, 4 and are detail views disclosing certain portions of theadjusting mechanism incorporated in the oifset disk harrow embodyingthis invention. y

Figure 6 is a top plan view of this improved offset disk harrow angledfor placing the front and rear gangs in proper Work performing positionsand for making a left turn; ann` Figure is a top plan view 'of Itheharrow angledV for a right turn. j j

In the drawings,wherein, for the purpose of'illustration, is shown apreferred embodiment of thev invention', the character A designates inits entirety the front Ygang of disks.

Suitably connected to this gang is the novel form of hitch B whichincludes offset adjustment mechanism. A rear gang C is con'- nected tothe front gang A by meansoi an v angling mechanism designated inits'entirety by the reference character D.y f

To morev specifically describe the various detail? featuresV ofconstruction, Vthe front gang A includes a frame formed 'of front andrear: parallel bars 10 and 11 respectively. Extending between these barsand func'- tioning to connect and properly spaceA the same, are thebraces 12 and 13. These two bracesl arearrangedon one side ofthelongitudinal- ,center of the (frame. [The angle frame bars 10 and 11`are connectedy and braced onthe other side of their longitudinalcenters by means of an angle bar 14:, which is bent into U-shape andzhasthe end portions of its branches,. as designated by the reference fcharacter 15,- suitably bolted or riveted to the frame angles 10 randl1., The rearwardly projecting loo ed `portionof the brace 14 performs aspecic functionwhich will be described at a later point. v YSuitablyconnected tothe bracing bars l2, 13 and 14, is a shaft 16 uponwhich-the disks bar 21, which includes a front Vsection 22, ,100

85 17 are suitably.mounted. The mannerof be of a character to. permit 9upper angle of the pivoted at 23 to the draw-bar 18 adjacent its o uterend. The rear section 24 of the adjustment bar is connected at 20, aspreviously described, to the frame of the front gang. The front section22 of the adjustment bar is formed with a strap or bracket 25, whichencircles the rear section 24 and is slidable thereon. This rear sectionis formed with a strap or bracket 26 which encirclesthe4 front section22 andisslidable thereon.

Figures 1 and'5 veryV clearly illustrate the rear section 24 as havingformed in, its horizontal flange a series of spaced apertures 27. Thestrap or bracket -.has as at 28, a latch member 29 which preferably oftriangularA formation. A depending projection or bolt 30 is formed onthis latch 'plat'e29-y and' is adapted to beselectively inserted in anyone of the apertures- 27. The plate 29 has pivotally vconnected theretoa rod 31 which extends for- 'wardly of the hitch to be pivotallyconnected at 32V toa perpendicularly extending control lever Thiscontrol lever is mounted by means-of a universal-joint 34 uponlthedrawbar'18. A tension spring 35l isrconnected at one endto the rod 31.at a distance from its pivotal connection with the latchv plate 29, andis connected at its remaining end to the bracket or strapl 25. Theoperation of this offset ladjustment mechanism will be described1 indetail at a later point n In Figure 3' the rear longitudinal frame vAbar 11 of the front gang A is illustrated as having v,rigidly securedthereto a bar 36.

This bar 36 cooperates with the frame bar 11 to form atruss, theangularl'y" bent ends 37 and 38 of the bar 36 being bolted or riveted tothe frame bar 11. Extending between the apex 39" of the truss and theoppositely disp-osed portion of the frame bar 11 is a brace 40, which isslotted at 41, for a purpose to be described at a later point. Anaperture 42 `is `formed in the brace 4() and receives aV pivot bolt 43,see Figures 1 and 4, which also passes through an aperture formed in thelooped. portion'y 44 of thefaforementioned U-shaped brace 14. f

lever- '45 is pivoted at 461 to the front fframebar 10'of thefrontgangA. This lever'has-pivoted thereto, as at 47, a latch or bolt 48, which'extends across the frame and has a downwardly and laterally offset end`positioned to enter theslot 41l formed in the brace 40, as disclosedinA Figures 3 and 4. Y This oifset end is slidable within thel sl'ot 41andV cooperates witlra transverse brace bar 49I connected at itsopposite ends to the sides ofthe looped portion 44 formed as a part ofthe brace 14. This transverse bar 49 is provided with a notch 50 toreceive the end edge of the latch 48.

The lever 45 has pivotally connected to its outer end a rod 51 whichextends longitudinally of the harrow to be pivotally connected pivotedVthereto, Y

at 52 to the control lever 33, as best illustrated in Figure 2.

The rear gang C is provided with a frame which includes a rear angle bar53 having connected thereto the rear ends of a plurality of transversebracing bars 54. The front endsV of most of these bracing members areconnected to a plate 55`which is of substantially triangular formationand extends longitudinally of the frame. It will be noted that the plate55 is provided with a plurality of setsof apertures 56 by means of whichthe said plate may be adjusted longitudinally of the remainder of theframe. The front edge Vof the Aplate 55 is rounded at 57 and thisroundedv portion is formed with a plurality of spaced notches`58.. l f

' F igurei 4 clearly illustrates the plate-55 as havingV an apertureformed therein for the reception of the pivot bolt or pin 43. The saidplate furthermore is illustrated as being interposed between the loopedportionv 44 of the brace 14 and the apex portion of the truss partiallyformed by the ang'ularly bent bar 36. The notches 58 are then positionedin cooperative relation with respect to -the `latching end of the bolt48. f v

. The rear gang C is providedwith a suitable number of disks 60 whichare mounted `upon a shaft 61 suitably. connected'to the transversebracemembers 54. Y

` In operating an oifsetdisk harrow of the type just described, theusual practice is to angle the front and rear gangs by aforward pullv onthe: part of the tractor, with the tractor travelling toward the left ormaking a left-turn. To accomplish this angle adjustment, the' operatorrocks the control lever 33 longitudinally of thedraw-bar 18 to cause therod 51 to pivot the lever 45 against the tension of the spring 63. Thismovement of the lever 45 shifts the latch 48longitudinally Yto disengageits end from the notches 58 formed. in the plate 55. The forwardmovement of the tractortoward the left will cause the front and reargangs to assume a proper angle with respect to each other, whereupon thelever 33 is moved into a vertical position for causing the latch 48 toengage'the nearest notch 58.. Thetractor then may be moved 'forwardlyandthe two gangs will angle with respect to each other andwill otfsetfrom the tractor as illustrated in Figure 6. lith the gangs angled inthis manner, the harrow may be turned to the .left without any furtheradjustment, Should itbecome desirable to make a right hand turn with theharrow the 'operator should again pivot the Vlever 33 to- Wardv thetractor for withdrawing the latch 48 from the notch it then occupies.`The Atractor may be then driven to the right and the rear harrow willpivot with respect to the front harrow and will make the turn withoutdigging anjT holes in the surface being The normal position of the gangsduring 'operation of the same is in an odset position with respect tothe tractor. The 'degree of odset varies with different types of workand for this reason it is desirable to be able to vary the hitch B. Thisodset adjustment may be accomplished in the following manner.

The latch plate 29 first should be pivoted upon the bracket 25 by alongitudinal movement ofthe rod 3l. This desired movement of the rodmaybe accomplishe'dby rocking the control lever 33 laterally ofthedraw-bai' 18. With the pin or bolt 30, formed as a part of the latchplate 29, removed from all of the apertures 27, the operator may drivethe tractor either forwardly or rearwardly for slidably adjustingthesections 22-`and 24; of the odset adjustment bar with respect to eachother to 4lengthen or `shortenthe overallfdimension of this bar. Afterthe said adjustment bar has been lengthened or shortened to the desiredextent,'the controllevel 33 should be rocked until it assumes a purelyvertical position and the latch pin 30 will enter one of the apertures27 The gangs then will assume theproper odset positions upon a forwardmovement ofthe harrow.

It willbe noted that the gangs may be angled in either direction Vand/orodset to any desired extent byk a manipulation of the single controllever 33, and that this lever is conveniently positioned to the driversseat of the tractor T. The disk harrow, therefore, may be put throughall ofits paces without requiring the operator to leave the seat of thetractor.

It is to be understood that the form of this invention herewith shownand described is to be ytaken as a preferred example of the sa-me, andthat various changes in the shape, size and arrangement of partsmay beresorted to without departing from the spirit of the invention or thescope of the subjoinedclaims. Having thus described my invention, whatIclaimis: A

1. Anodset disk harrow of thetype de scribed comprising a pair of gangs,means for pivotally connectingthe gangs,v andlatchingmeansconcentrically positioned relative the vaforesaid, means for retainingthe gangs angled with respect to each other. i

2. An odset disk harrow of the type described comprising a pair oftandem gangs, means for pivotally connecting the gangs to permit them to'freely angle in either direction, and latching means for .retaining thegangs angled to any desired extent in one of said directions. 3.`Anodset disk harrow of the type described comprising a pair of tandemgangs, a fifth wheel structure pivotally connecting saidgangs to permitthem to angle to either side of a parallel position, and latching meansassociated with said fifthwheel structure.

ll. An odset disk harrow of the type described comprising a pair oftandem, gangs, a pair-of superimposed frame members extendingrearwardlyof the front gang, and a plate carried by the rear gangpivotally connected to and positioned between saidsuperimposedframefmembers at all pivotedv positions of the gangs. i 5.An odset disk scribed comprising front and rear gangs,

means-for pivotally connecting saidl gangs to permitV them to angle ineitheridirection, said means including a plate carried by the rear gangand pivoted to aframe extension on; the front gang, said plate having aseries4 of notches formed in one edge thereof, and means carriedV by thefront gang for engaging any one of said notches to retain vthe gangsangled in one direction to any desired extent. f

harrow of the type'de- 'IVO 6. An odset disk harrow of the type de'-` nscribed comprising a pair of pivotally connected gangs,-means forretaining said gangs pivotally adjusted with respect to each other, ahitch connected to one of said gangs, means for varying the angle ofdraft 'of said hitch, and a common control member for actuating theaforementionedfmeans.

7 An `odset disk harrowof the type described1 comprising front and reargangs, means for pivotally connecting said gangs, a latch mechanism forretaining the gangs in a pivoted condition with respect'to each other,4a hitch connected to one of said gangs and adjustableto vary the angleof draft, latching means for retaining said hitch in any desiredadjusted condition, and a single control lever for operating latchingmeans.

8. An odset disk harrow of the type described comprising a pair ofgangs, means for pivotally'connecting said gangs, and a hitchconnected'to one offsaid gangs, said both of saidy hitch including adraw bar `and an odset admeans for pivotally connecting said gangs and ahitch connected to the front gang, said hitch yincluding a dravv barpivoted to the gang andan extensible adjustment barpivoted to the gangand to the draw bar, a lever pivotally mounted on the draw' ba-r, and alatch'for controlling the adjustment of the extensible baroperativelyconnected to said lever.

10. An olset disk barrow of the type described comprising front and reargangs, a triangulai` plate carried by one of said gangs and projectingtoward the remaining gang, a support carried by said remaining gang, apivot pin extending through said support and the plate, and meansassociated With said plate for retaining the same in any desired pivotedposition With respect to said support. All. An offset disk harrowl ofthetype described comprising a pair oftandem gangs, a frame extensioncarried by the frontV gang, a longitudinally extending plate adjustablyconnected to the rear gang,and means for horizontally pivotallyconnecting the plate to said frame extension vvith the parts inoverlapped relation to prevent relative vertical pivoting of the gangsat alltimes.

1Q. An offset disk barrow ofthe type described. comprising a pair oftandem gangs, a frame extension carried by the front gang, alongitudinally extending plate adjustably Vconnected to the rear gang,means for pivot-l ally connecting the plate to said frame extension,said platefhavmg a series of notches 1n one edge thereof and a latchcarried by the Vfront gang'adapted to selectively engage one of saidnotches. i 1- 13.y An odset disk harrowof the Itype dcscribed,comprising-a pair of tandem gangs,

,means for pivotally. connecting the. gangs to permit them vto angleeither to the right or to the left, and means for retaining the gangs inangled positions at either side of their parallelposition.

14. An offset ,disk barrow of the type described, comprising a pair ofpivotally connected tandem gangs, a hitch connected to the front gang,and means for varying the angle of draft of said hitch, said meanscomprising a draw-bar non-adjustable in length connected to one side ofthe gang, an adjustable bar-connected to the other side of the gang, andto the draw-bar and including slidably`connected sections, means forretaining said sections against relative sliding movement, a controllever supported by the drawbar, and means operatively connecting thelever to the retaining means. Y

15. An offset disk barrow of the type described, comprising a pair ofpivotally connected tandem gangs, a hitch connected to the front gang,and means for varying the angle of draft of said hitch, said meanscomprising a draw-bar connected to one side of the gang, an adjustablebar connected to the other side of the Agang and t-o the draw-bar andincluding slidably connected sections, means pivotally mounted on one ofsaidl sections and engageable With the other section for retaining saidsections against relative sliding movement, a control lever supported bythe drawbar,and means operatively connecting the lever to thev pivotalretaining means.

16. An offset disk harrovv of the type described, comprising a pair ofpivotally connected tandem gangs, a hitch connected to the front gang,and means for varying the angle of draft of said hitch, said meanscomprising a draw-bar connected to one side of the gang, an adjustablebar connected to thc other side of the gang and to the draw-bar andincluding slidably connected sections, and means for retaining saidsections against relative sliding movement; means for retaining saidgangs pivotally adjusted With respect toeach other, and a common controlfor actuating the retaining means for the slidable bar sections and thepivotal gangs.

17. An odset disk barrow of the type described, comprising a pair ofpivotally conf nected tandem gangs, a hitch connected to the front gang,and means for varying the angle of draft of said hitch, said meanscomprising a draw-bar connected to one side of the gang, an adjustablebar connected to the other side ofthe gang and to the drawbar andincluding slidably connected sections, and meanspivotally mounted ononeof said sections and engageable with the other section for retainingsaid sections against relative sliding movement; means for retainingsaid gangs pivotally adjusted with respect to each other, and a commoncontrol for actuating the retaining means for the pivotal gangs and theslidable bar sections.

18. An offset harroyv` frame including a rear frame bar, a plurality ofbraces connected to the frame bar, and a front frame member consistingof a plate formed with a straight edge portion to which the braces areconnected and a forwardly projecting portion acting as a hitch for thegang.

19. An offset harrovv frame including a rear frame member, a front framemember consisting of a vplate having one edge portion substantiallyparallel With the rear frame member and a forwardly projecting hitchportion havingA a pivot pin bearing positioned'to one side of the foreand aft axis of the frame, and means for connecting the said framemembers.

20. An oflsetharrow frame including a rear frame member, a front framemember consisting of a plate having one edge portion substantiallyparallel With the rear frame .I

member f and a forwardly projecting hitch portion having a pivot pinybearing positioned to one side of the fore and aft axis oftheframe,

and braces fixed to the rear frame member ,Ans

and connected to the said edge portion ofthe front frame member topermit adjustment of the latter member to vary the position of the pivotpin bearing.

2l. An oifset disk barrow of the type described, comprising a pair oftandem gangs, a pair of super-imposed members projecting from one ofsaid gangs between its ends and toward the second gang, a plateprojecting from the second gang toward the rst gang and positionedbetween said super-imposed members, the plate and. super-imposed membersbeing overlapped longitudinally and transversely of the harrow toprevent the gangs from twisting or rocking with respeet to each otheraboutk horizontal axes in all relative positions of the gangs, and apivot element passing through said super imposed members and said platefor pivotally connecting the gangs to permit turning in both directions.

In testimony whereof I aix my signature.

JESSE G. LINDEMAN.

